A coot rag (rag of the cooter) is a very universal term, ranging from its actual meaning (a rag used to clean vaginal fluids usually a mix of semen and pussy au jus) to its more oftenly used slang meaning, "dude quit bein a coot rag"...pretty much one of the best insults of 21st century.

try it out and baffle your friends....and when they say "dude, what the fuck is a coot rag...just be like GOD YOUR DUMB, go look it up on urban dictionary....ya COOT RAG!